When I engage four wheel drive, it makes a clunk sound

2006 FORD F-150
146,000 MILES • 5.4L • V8 • 4WD • AUTOMATIC
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CARL EASTEP
  • MEMBER
  • 1 POST
Louder under immediate pressure. Quieter and maybe a few times if I engage early before under pressure. Also, how fast can I be going to engage four wheel drive and how fast can you drive in four wheel drive?
Mar 28, 2021 at 4:51 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,628 POSTS
This can be normal because the transfer case does make noise when operating. also it could be a bad U joint in the front driveline. Can you please shoot a quick video with your phone so we can hear the noise? that would be great. You can upload it here with your response.
Apr 12, 2021 at 5:17 AM
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